(87) Sylvia Outer Main-belt Asteroid

Discovered on 16 May 1866 by N. R. Pogson at Madras.

Where Sylvia is today

MercuryVenusEarthEarthMarsMarsSylviaSylvia

Seen from above the solar system on 2026-10-14: Sylvia is 3.76 au from the Sun and 4.18 au from Earth. Computed from JPL's orbital elements.

Facts

Number87
Provisional designationA866 KA
Orbit classOuter Main-belt Asteroid
Diameter253 km (#12 largest of 17,440 named asteroids with a measured size)
Albedo0.0460
Rotation period5.18 hours
Spectral typeP
Absolute magnitude (H)6.93
Orbital period6.52 years
Semi-major axis3.49 au
Perihelion – aphelion3.16 – 3.82 au
Eccentricity0.0942
Inclination10.8°
Closest distance between its orbit and Earth's (MOID)2.18 au

Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.

More named asteroids discovered by N. R. Pogson